SQ and sonic presentation comparison between the HeadStage Arrow and the Little Dot MK III

I was curious if any one here has had the opportunity to compare the sound quality and presentation of the Headstage Arrow and the Little Dot MK III. I realize that is this isn't an apples-to-apples comparison (more a, ss vs tube/portable vs desktop, comparison), but I am more interested in how they stack up against each other in terms of sound.

For flexibility and variety of applications the Arrow wins hands down, but I wanted to know if the MK III is substantially better (or worse) than the Arrow for pure listenability.